Forbairt rothar
Invented in Germany in 1817, the world's first bicycle was a two-wheeled wooden vehicle that could be straddled and propelled by fast walking. It was invented to meet the need for horseless transportation during a time of oat shortage, calling it the laufmaschine or "treadmill". Built almost entirely of wood, it weighs 22kg and has no pedals, but what it lacks in practicality it makes up for in speed. On its maiden flight, the bike covered 13 kilometers in less than an hour.
I 1960, reáchtáil an bheirt athair agus mac cuideachta a rinne carráistí capall i bPáras, agus chuir siad le chéile rothar dhá roth timpeall 1867 ar dtús. Tá an rothar tiomáinte cosúil le trírothach, leis an cromáin agus pedals ceangailte leis an roth tosaigh.
Is é an chéad giar-rothar scaoileadhd in1871. Pneumatic tires is in 1888
John Boyd Dunlop is a Scottish veterinarian living in Belfast. His son complained that the cobbled streets made his hips sore as he biked to school. Dunlop solved his son's problem by inventing the inner tube and patented a pneumatic tire, which is essentially a hose tube inside an outer rubber tire with a tread. But it was withdrawn two years later due to a previous patent by Scottish inventor Robert William Thompson.
Rothair Sábháilteachta
The term safety bike was used in the 1880s to refer to any alternative to the penny, and it sparked a bike craze due to being lighter, cheaper, and easier to ride. Unlike penny farthings, the rider's feet are within range of the ground, making it easier to stop, greatly reducing the risk of "heading" or falling over the handlebars for extended periods of time. The bicycle's impact on women's liberation was enormous and became a symbol of the new woman, at the heart of the "dress for reason" movement of the late 19th century.
Spoirtrothar
In the 1890s, women's versions of sports car designs were already very popular. It has a stepped frame, rather than the diamond-shaped frame of the gentleman's style, so that ladies can wear dresses and skirts for easy rides and bikes, and often comes with skirt guards to keep skirts and dresses from getting tangled. rear wheel and spokes. Like the men's sports car, the frame is steel, and the frame and handlebars are positioned to give the rider a very upright riding position. Although they originally came with front scoop brakes, technological advancements meant that later models came with much-improved coaster brakes or lever-actuated rim or drum brakes.
Rothar BMX
Is rothair saintógtha iad rothair BMX, le rothaí 16 go 24 orlach de ghnáth (is rothaí caighdeánacha iad 20 orlach), agus is as California a tháinig siad go luath sna 1970idí nuair a rinne déagóirí aithris ar a laochra motocross ar rothair. In the Netherlands, children race on standard road bikes on an off-road track. The 1971 motorcycle racing documentary On Any Sunday is generally credited with sparking a national movement in the United States. In the opening scene, the kids ride their Schwinn Sting-Rays off-road. It wasn't until the middle of the century that the sport reached critical mass and manufacturers started making bikes specifically designed for the sport.
Rothar Sléibhe
Sa bhliain 1981, tugadh isteach an chéad rothar sléibhe olltáirgthe, deartha chun pábháil as-ar dhromchlaí éagsúla. D’éirigh láithreach leis, agus sna 1980idí ba é an bhaint gasta de shamplaí ó sheilfeanna na miondíoltóirí, úrnuacht ATVanna agus dúil mhéadaithe na gcónaitheoirí cathracha éalú óna dtimpeallacht le rothaíocht sléibhe agus spóirt mhóra eile a spreag an tóir a bhí orthu. Tá frámaí níos láidre, boinn níos leithne agus snaidhmeanna níos mó i gceist leis na rothair seo le haghaidh tarraingt méadaithe, suíomh suíocháin níos airde (le haghaidh infheictheacht níos fearr agus coigilteas meáchain), agus éagsúlacht mhéadaitheach de dhearaí fionraí tosaigh agus cúil. Faoi 2000, bhí díolacháin rothar sléibhe i bhfad níos airde ná rásaíocht. , spórt/rásaíocht, agus rothair chamchuairte.
Maidir le díograiseoirí rothair, is é teacht na rothair ná rud álainn, foinse sonas, agus tá go leor buntáistí tugtha ag rothair dúinn is cuma cén tréimhse ama. Ón luas taistil atá againn a fheabhsú go dtí an tóir atá ar thaisteal ísealcharbóin faoi láthair, tá tábhacht mhór leis.
